4 speed or 4 speed OD?

FABO member Badlilred79 has a 4 speed OD in his yellow 70 duster with a blown 340 in it. It has stood up to a lot of abuse for years.

I can't say if it has been beefed up internally but I know I have taken a wild ride in that car and the transmission has held up.

I also know he doesn't power shift into 4th. Hard throttle is 1-3 and 4th gear is just for cruising.